Minification
Code Minification
The process of removing unnecessary characters from code (whitespace, comments) to reduce file size.
Technical Detail
Code minification removes whitespace, comments, shortens variable names (in JS), and applies optimizations like dead code elimination. JavaScript minifiers (Terser, esbuild) can reduce file size by 40-70%. CSS minifiers merge duplicate rules, shorten color values (#ffffff → #fff), and remove redundant units (0px → 0). Combined with Brotli compression, minified assets achieve total size reductions of 80-90%. Source maps (.map files) enable debugging minified code by mapping back to original sources.
Example
```javascript
// Simple CSS minifier
function minifyCSS(css) {
return css
.replace(/\/\*[\s\S]*?\*\//g, '') // remove comments
.replace(/\s+/g, ' ') // collapse whitespace
.replace(/\s*([{};:,])\s*/g, '$1') // remove around symbols
.trim();
}
// 1024 bytes → 612 bytes (40% reduction)
```
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